HAZMAT Table 2b,,,,,,,,,,,,
"Hazardous Material Shipment Characteristics by Hazard Class: 2002 and 1997
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"[Estimates are based on data from the 2002 and 1997 Commodity Flow Surveys. Because of rounding, estimates may not be additive]
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Hazard class and description,Value,,,Tons,,,Ton-miles,,,Average miles per shipment,,
,"2002 
(million $)","1997 
(million $)","Percent 
change","2002 
(thousands)","1997 
(thousands)","Percent 
change","2002 
(millions)","1997 
(millions)","Percent 
change",2002,1997,"Percent 
change"
Total," 660,181 "," 526,679 ", 25.3 ," 2,191,519 "," 1,783,620 ",22.9," 326,727 "," 294,823 ", 10.8 , 136 , 110 , 23.7 
"Class 1, Explosives"," 7,901 "," 5,584 ", 41.5 ," 5,000 "," 1,718 ",191.0," 1,568 ", S , S , 651 , 771 , –15.6 
"Class 2, Gases"," 73,932 "," 47,288 ", 56.3 ," 213,358 "," 137,138 ",55.6," 37,262 "," 26,002 ", 43.3 , 95 , 60 , 58.7 
"Class 3, Flammable liquids"," 490,238 "," 386,994 ", 26.7 ," 1,788,986 "," 1,450,591 ",23.3," 218,574 "," 184,824 ", 18.3 , 106 , 69 , 54.3 
"Class 4, Flammable solids"," 6,566 "," 4,238 ", 54.9 ," 11,300 "," 14,832 ",–23.8," 4,391 "," 9,735 ", –54.9 , 158 , 660 , –76.0 
"Class 5, Oxidizers and organic peroxides"," 5,471 "," 4,485 ", 22.0 ," 12,670 "," 9,239 ",37.1," 4,221 "," 4,471 ", –5.6 , 407 , 193 , 111.2 
"Class 6, Toxic (poison)"," 8,275 "," 10,085 ", –18.0 ," 8,459 "," 6,366 ",32.9," 4,254 "," 2,824 ", 50.6 , 626 , 403 , 55.2 
"Class 7, Radioactive materials"," 5,850 "," 2,722 ", 114.9 , 57 , 87 ,–35.1, 44 , 48 , –8.8 , S , 445 , S 
"Class 8, Corrosive materials"," 38,324 "," 41,336 ", –7.3 ," 90,671 "," 98,331 ",–7.8," 36,260 "," 42,918 ", –15.5 , 301 , 205 , 46.7 
"Class 9, Miscellaneous dangerous goods"," 23,625 "," 23,946 ", –1.3 ," 61,018 "," 65,317 ",–6.6," 20,153 "," 22,727 ", –11.3 , 368 , 323 , 13.9 
"KEY: 
– Represents and estimate equal to zero or less than 1 unit of measure.  
S Estimate does not meet publication standards b ecause of highly sampling variability or poor response quality.",,,,,,,,,,,,
"SOURCE:  Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.",,,,,,,,,,,,